Intelligent multimedia playback re-positioning

ABSTRACT

Methods, systems and computer readable media may facilitate the repositioning of content based upon scene boundaries. In embodiments, content may be automatically repositioned at a scene boundary, so that the content presentation starts from a more meaningful and sensible point after a re-position (e.g., time-shift, trickplay, seek, etc.). Also provided herein is an approach to provide an option for the user to start playback of content from an absolute time based repositioned point or a scene based repositioned point. Scene change detection may be used to detect scene changes within a piece of multimedia content as the content is being received, played, or recorded by a device. Scene changes within a piece of content may be identified using scene meta-data created on a per content basis, wherein the meta-data includes the starting frame offset of each scene along with the duration of the scene.

CROSS REFERENCE TO RELATED APPLICATION

This application is a non-provisional application claiming the benefitof U.S. Provisional Application Ser. No. 62/157,824, entitled“Intelligent Multimedia Content Re-Positioning,” which was filed on May6, 2015, and is incorporated herein by reference in its entirety.

TECHNICAL FIELD

This disclosure relates to the determination of a playback positionafter a trickplay operation is carried out on multimedia.

BACKGROUND

Currently, set-top boxes (STB) and other similar multimedia devices aredeployed in heterogeneous environments and are configured to decode andrecord content on local storage or at a remote server (e.g., serverwithin a wide area network (WAN)). A user may control the viewingexperience of a piece of multimedia content by applying varioustrickplay functions to the output of the multimedia content. Content maybe played back, time shifted or repositioned according to trickmodessuch as fast-forward, rewind, seek, absolute or relative move and skipcommands and other functions to skip unwanted parts of content oradvertisements.

A user may use time-shifting, trickplay or other commands (e.g., skips,jumps, seeks, etc.) during content playback to move to a next/newposition within a piece of multimedia content. Typically, during thetime-shifting of content, a user is not so much worried about the timingaccuracy for resuming normal playback, but more on scene accuracy (e.g.,the user typically desires to resume playback of the content at a newscene). The current mechanisms for repositioning content are based onframe boundaries, thus, a repositioned presentation may start fromanywhere within a scene (i.e., the reposition, entry point could be atany position within a scene). With repositioning based on frameboundaries, a user may miss portions of a scene or may be forced toapply a subsequent trickplay operation to the content to find a desiredresume point in the content. Therefore, it is desirable to improve uponmethods and systems for determining a playback position after atrickplay operation is carried out on a piece of multimedia.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a block diagram illustrating an example network environmentoperable to facilitate the determination of a playback position basedupon a scene boundary.

FIG. 2 is a block diagram illustrating an example multimedia deviceoperable to facilitate a re-positioning of a playback position at ascene boundary within a piece of content.

FIG. 3 shows a stream of frames associated with a piece of multimediacontent.

FIG. 4 shows a stream of frames associated with a piece of multimediacontent, wherein each frame is associated with a scene.

FIG. 5 shows a stream of frames associated with a piece of multimediacontent, wherein each frame is associated with a scene, and wherein anentry point is determined based upon the identification of a sceneboundary.

FIG. 6 is a flowchart illustrating an example process operable tofacilitate the determination of a playback position based upon a sceneboundary.

FIG. 7 is a block diagram of a hardware configuration operable tofacilitate the determination of a playback position based upon a sceneboundary.

Like reference numbers and designations in the various drawings indicatelike elements.

DETAILED DESCRIPTION

It is desirable to improve upon methods and systems for determining aplayback position after a trickplay operation is carried out on a pieceof multimedia. The methods, systems and computer readable mediadescribed herein facilitate the repositioning of content based uponscene boundaries. In embodiments, content may be automaticallyrepositioned at a scene boundary, so that the content presentationstarts from a more meaningful and sensible point after a re-position(e.g., time-shift, trickplay, seek, etc.). Also provided herein is anapproach to provide an option for the user to start playback of contentfrom an absolute time based repositioned point or a scene basedrepositioned point. Scene change detection may be used to detect scenechanges within a piece of multimedia content as the content is beingreceived, played, or recorded by a device. Scene changes within a pieceof content may be identified using scene meta-data created on a percontent basis, wherein the meta-data includes the starting frame offsetof each scene along with the duration of the scene.

An embodiment of the invention described herein may include a methodcomprising: (a) applying a trickplay operation to a piece of multimediacontent; (b) in response to a received resume command, identifying acurrent frame based upon a current playback position within the piece ofmultimedia content at the point at which the resume command is received;(c) identifying a scene associated with the current frame; (d)identifying a first frame of the scene; and (e) initiating playback ofthe piece of multimedia content from the first frame of the scene.

According to an embodiment of the invention, the method described hereinfurther comprises outputting a prompt requesting a user to selectbetween a playback of the piece of multimedia content from the firstframe of the scene or from an inline frame immediately preceding thecurrent frame.

According to an embodiment of the invention, the prompt comprises adisplay of the first frame of the scene and a display of the inlineframe immediately preceding the current frame.

According to an embodiment of the invention, the method described hereinfurther comprises: (a) receiving a user command to begin playback fromthe inline frame immediately preceding the current frame; (b) creatingan entry point at the inline frame by repositioning a pointer to theinline frame; and (c) initiating playback of the piece of multimediacontent from the inline frame.

According to an embodiment of the invention, the first frame of thescene is identified from meta-data retrieved from the piece ofmultimedia content.

According to an embodiment of the invention, one or more sceneboundaries within the piece of multimedia content are identified andtagged as the piece of multimedia content is received, and the firstframe of the scene is identified based on the one or more tagged sceneboundaries.

According to an embodiment of the invention, the method described hereinfurther comprises creating an entry point at the first frame of thescene by repositioning a pointer to the first frame of the scene.

An embodiment of the invention described herein may include an apparatuscomprising: (a) a playback module configured to apply a trickplayoperation to a piece of multimedia content; (b) a control interfaceconfigured to be used to receive a resume command; (c) a playbackposition module configured to identify a current frame based upon acurrent playback position within the piece of multimedia content at thepoint at which the resume command is received; (d) a scene boundarymodule configured to: (i) identify a scene associated with the currentframe; and (ii) identify a first frame of the scene; and (e) theplayback module being further configured to initiate playback of thepiece of multimedia content from the first frame of the scene.

According to an embodiment of the invention, the apparatus describedherein further comprises a display interface configured to be used tooutput a prompt requesting a user to select between a playback of thepiece of multimedia content from the first frame of the scene or from aninline frame immediately preceding the current frame.

According to an embodiment of the invention: (a) the control interfaceis further configured to be used to receive a user command to beginplayback from the inline frame immediately preceding the current frame;(b) the playback position module is further configured to create anentry point at the inline frame by repositioning a pointer to the inlineframe; and (c) the playback module is further configured to initiateplayback of the piece of multimedia content from the inline frame.

An embodiment of the invention described herein may include one or morenon-transitory computer readable media having instructions operable tocause one or more processors to perform the operations comprising: (a)applying a trickplay operation to a piece of multimedia content; (b) inresponse to a received resume command, identifying a current frame basedupon a current playback position within the piece of multimedia contentat the point at which the resume command is received; (c) identifying ascene associated with the current frame; (d) identifying a first frameof the scene; and (e) initiating playback of the piece of multimediacontent from the first frame of the scene.

According to an embodiment of the invention, the instructions arefurther operable to cause one or more processors to perform theoperations comprising outputting a prompt requesting a user to selectbetween a playback of the piece of multimedia content from the firstframe of the scene or from an inline frame immediately preceding thecurrent frame.

According to an embodiment of the invention, the instructions arefurther operable to cause one or more processors to perform theoperations comprising: (a) receiving a user command to begin playbackfrom the inline frame immediately preceding the current frame; (b)creating an entry point at the inline frame by repositioning a pointerto the inline frame; and (c) initiating playback of the piece ofmultimedia content from the inline frame.

According to an embodiment of the invention, the instructions arefurther operable to cause one or more processors to perform theoperations comprising creating an entry point at the first frame of thescene by repositioning a pointer to the first frame of the scene.

FIG. 1 is a block diagram illustrating an example network environment100 operable to facilitate the determination of a playback positionbased upon a scene boundary. In embodiments, a multimedia device 110 maybe configured to provide multimedia services to one or more clientdevices 120. The multimedia device 110 may include a multimedia orresidential gateway, a set-top box (STB), or any other device configuredto receive, store, and/or deliver multimedia content to one or moreclient devices 120. Client devices 120 may include televisions,computers, tablets, mobile devices, STBs, game consoles, and any otherdevice configured to receive a multimedia service.

In embodiments, multimedia content may be delivered from a multimediadevice 110 to one or more client devices 120 over a local network 130(e.g., a local area network (LAN), a wireless local area network (WLAN),a personal area network (PAN), etc.). The multimedia device 110 mayreceive services from and may communicate with an upstream wide areanetwork (WAN) 140 through a connection to a provider network 150. Itshould be understood that the multimedia device 110 may operate as anaccess point to wirelessly deliver multimedia content to one or moreclient devices 120 that are associated with the multimedia device 110 asstations.

In embodiments, a multimedia device 110 may communicate with a clientdevice 120 over a wired or a wireless connection. The multimedia device110 may provide one or more channels or service sets through whichservices and communications may be delivered wirelessly to one or moreclient devices 120. A client device 120 may associate and authenticatewith a multimedia device 110 or associated access point (e.g., wirelessrouter, network extender, etc.), after which communications and servicesmay be delivered from the multimedia device 110 to the client device120. It should be understood that various protocols and/or standards(e.g., Wi-Fi, multimedia over coax alliance (MoCA), ZigBee etc.) may beused to deliver communications between a multimedia device 110 andclient device 120.

A multimedia device 110 may output live or linear content to a clientdevice 120 as the content is received at the multimedia device 110, orthe multimedia device 110 may store content and output the storedcontent to a client device 120 at a later time. Content may be stored atthe multimedia device 110, at a remote device within a correspondingcustomer premise, or at a server within an upstream network (e.g., WAN140).

In embodiments, a piece of content received at a multimedia device 110may be delineated according to a number of scene boundaries. Forexample, a received piece of content may have a plurality of scenesseparated by one or more scene boundaries. When viewing the piece ofcontent at a display device, a user might want to skip forward orbackward to the beginning of a desired scene. Using the scene boundariesassociated with the piece of content, the multimedia device 110 may beconfigured to identify a nearest, or most relevant scene boundaryassociated with the point at which a user brings the piece of contentout of a trickplay mode. For example, when the user brings the contentout of a trickplay mode, the multimedia device 110 may be configured toidentify the beginning point of the current scene (e.g., preceding sceneboundary) and to begin playback of the content from the identifiedbeginning point. In embodiments, scene boundaries within a piece ofcontent may be identified from meta-data associated with the content ormay be identified by the multimedia device 110, or other device, using ascene change detection algorithm. The scene change detection algorithmmay enable hardware scene change detection when the content is beingplayed or recorded. For example, the beginning, end, and/or duration ofa scene may be identified by determining the location of one or morescene changes within a piece of content.

It will be appreciated by those skilled in the relevant art that varioustechniques may be used to enable hardware scene change detection when apiece of content is being recorded, transcoded or played. For contentthat is being recorded as it is also being played, a firmwareimplementation can create scene meta-data that may assist in theidentification of scene transition points. For content that is onlyrecorded and not played at the time of recording, a firmwareimplementation can create scene meta-data at a later stage, for examplewhen the recorded content is played for the first time or when gettingtranscoded. The scene meta-data created on a per content basis maycontain a starting frame offset for each scene along with the durationof the scene. Thereby, the scene meta-data may aide in fetching tonecessary offsets within the content when the playback of the content isinitiated or resumed.

In embodiments, playback of a piece of content delivered to a clientdevice 120 by the multimedia device 110 may be controlled by user input.For example, the user may control playback, trickplay, and recordingfunctions at the multimedia device 110 using various buttons (e.g.,record, play, fast-forward, rewind, skip, and other trickplay controls)at a control device (e.g., remote control unit (RCU)).

In embodiments, while a trickplay function is being carried out on apiece of multimedia content, and when user input instructs themultimedia device 110 to stop trickplay of the content, the content maybe resumed from the frame being acted upon at the instance when the userinput is recognized. It should be understood that there are varioustechniques and calculations for stopping trickplay of content at anindividual frame (e.g., timing, frame count techniques, etc.).

In embodiments, the individual frame recognized as the current frame maybe a frame that is in between two I-frames (inline frames). Themultimedia device 110 may select an entry point by repositioning apointer selecting a frame within the content stream from which to resumeplayback. The pointer may be repositioned to the first I-frame precedingthe current frame, so that the content is resumed from a clear,independent frame. It should be understood that various techniques maybe used to identify an I-frame associated with the current frame (e.g.,using frame dependency information of the current frame).

In embodiments, the multimedia device 110 may identify a sceneassociated with the current frame. The multimedia device 110 mayretrieve an association between the current frame and a scene. Forexample, the multimedia device 110 may pull data from the incomingcontent stream, and may store associations between each frame of thecontent and a particular scene. The multimedia device 110 may designatethe beginning of a scene as the entry point by repositioning the pointerto the first I-frame of the scene associated with the current frame sothat the content is resumed from the beginning of the current scene. Itwill be appreciated by those skilled in the art that various techniquesmay be used to gather and store scene change data associated with acontent stream. It should be understood that the first I-frame of ascene may be identified using various techniques (e.g., based on timingof the content stream, based on frame count, etc.).

In embodiments, when a trickplay function is being carried out on apiece of content, and user input instructs the multimedia device 110 tobring the content out of the trickplay status, the multimedia device 110may identify an entry point at the first I-frame preceding the currentframe and/or an entry point at the first frame of the scene associatedwith the current frame. A user may then be prompted to select whether toresume the content from the first I-frame preceding the current frame orthe first frame of the scene associated with the current frame. Forexample, split video windows may be displayed to a user, wherein a firstwindow includes one or more frames at the first I-frame preceding thecurrent frame and a second window includes one or more frames at thefirst frame of the scene associated with the current frame. Themultimedia device 110 may then reposition a pointer to either the firstI-frame preceding the current frame or the first frame of the sceneassociated with the current frame based upon the user selection. Itshould be understood that the multimedia device 110 may be configuredwith a default option for selecting between two or more entry points.For example, the multimedia device 110 may be configured toautomatically begin playback of content coming out of trickplay at thefirst frame of the scene associated with the current frame. It should befurther understood that a user selection of an entry point option may beused by the multimedia device 110 to control future entry pointdecisions made with respect to the piece of content currently beingviewed and/or content that is subsequently output by the multimediadevice 110.

FIG. 2 is a block diagram illustrating an example multimedia device 110operable to facilitate a re-positioning of a playback position at ascene boundary within a piece of content. The multimedia device 110 mayinclude a playback module 210, a control interface 220, a playbackposition module 230, and a scene change detection module 240. Themultimedia device 110 may include a multimedia or residential gateway, aset-top box (STB), or any other device configured to receive, store,and/or deliver multimedia content to one or more client devices 120.

In embodiments, the multimedia device 110 may communicate with one ormore client devices 120 over a wired or a wireless connection. Themultimedia device 110 may output content and/or other services to clientdevices 120 through an interface and may receive requests for contentand/or other upstream communications through the interface. It should beunderstood that the interface configured to receive and outputcommunications may include various wired and/or wireless interfacesusing various protocols and/or standards (e.g., Wi-Fi, multimedia overcoax alliance (MoCA), ZigBee, Ethernet, etc.) that may be used todeliver communications between a multimedia device 110 and client device120. For example, the multimedia device 110 may communicate with one ormore client devices 120 over a local network 130 of FIG. 1.

In embodiments, content may be received at the multimedia device 110from a content source 250. The content source 250 may reside within themultimedia device 110, at a remote device within an associated customerpremise, or at a server within an upstream network (e.g., providernetwork 150 of FIG. 1, WAN 140 of FIG. 1, etc.). Communications andservices received at the multimedia device 110 may be forwarded to oneor more client devices 120 through one or more interfaces. For example,content streams (e.g., live or linear content, VoD content, recordedcontent, etc.) may be recorded by the multimedia device 110 and storedat local or remote storage, and/or the content streams may be forwardedto one or more client devices 120 through one or more interfaces.

In embodiments, the output of content (e.g., both recorded and linearcontent) may be controlled by user requests received from a controldevice (e.g., RCU) through the control interface 220. For example, auser may view available content through a menu displayed at a displaydevice, and may select content for delivery from the multimedia device110 to a client device 120. The user may control playback and recordingfunctions at the multimedia device 110 using various buttons at acontrol device (e.g., record, play, fast-forward, rewind, skip, andother trickplay controls).

In embodiments, a playback module 210 may control playback of multimediacontent received from a content source 250 (e.g., digital video recorderstorage, upstream server, etc.). The playback module 210 may outputmultimedia content to a display (e.g., client device 120 or display thatis otherwise associated with or connected to the multimedia device 110).The speed of content playback may be controlled by a user. For example,user input may be received through the control interface 220. The userinput may include any of various trickplay requests (e.g., skip, seek,jump, fast-forward, rewind, etc.). User input may also include functionsoperable to stop or resume trickplay of content (e.g., play, pause,stop, etc.).

In embodiments, while a trickplay function is being carried out by theplayback module 210 on a piece of multimedia content, and when userinput instructs the multimedia device 110 to stop trickplay of thecontent, the content may be resumed by the playback module 210 from theframe being acted upon at the instance when the user input isrecognized. It should be understood that there are various techniquesand calculations for stopping trickplay of content at an individualframe (e.g., timing, frame count techniques, etc.).

In embodiments, the individual frame that the playback module 210recognizes as the current frame may be a frame that is in between twoI-frames. The playback position module 230 may select an entry point byrepositioning a pointer selecting a frame within the content stream fromwhich to resume playback. The pointer may be repositioned to the firstI-frame preceding the current frame, so that the content is resumed froma clear, independent frame. It should be understood that varioustechniques may be used to identify an I-frame associated with thecurrent frame (e.g., using frame dependency information of the currentframe).

In embodiments, the playback position module 230 may identify a sceneassociated with the current frame. The playback position module 230 mayretrieve an association between the current frame and a scene from thescene change detection module 240. For example, the scene changedetection module 240 may pull data from the incoming content stream, andmay store associations between each frame of the content and aparticular scene. The playback position module 230 may designate thebeginning of a scene as the entry point by repositioning the pointer tothe first I-frame of the scene associated with the current frame so thatthe content is resumed from the beginning of the current scene. It willbe appreciated by those skilled in the art that various techniques maybe used to gather and store scene change data associated with a contentstream. It should be understood that the first I-frame of a scene may beidentified using various techniques (e.g., based on timing of thecontent stream, based on frame count, etc.).

In embodiments, when a trickplay function is being carried out on apiece of content, and user input instructs the multimedia device 110 tobring the content out of the trickplay status, the playback positionmodule 230 may identify an entry point at the first I-frame precedingthe current frame and/or an entry point at the first frame of the sceneassociated with the current frame. A user may then be prompted to selectwhether to resume the content from the first I-frame preceding thecurrent frame or the first frame of the scene associated with thecurrent frame. For example, split video windows may be displayed to auser, wherein a first window includes one or more frames at the firstI-frame preceding the current frame and a second window includes one ormore frames at the first frame of the scene associated with the currentframe. The playback position module 230 may then reposition a pointer toeither the first I-frame preceding the current frame or the first frameof the scene associated with the current frame based upon the userselection. It should be understood that the playback position module 230may be configured with a default option for selecting between two ormore entry points. For example, the playback position module 230 may beconfigured to automatically begin playback of content coming out oftrickplay at the first frame of the scene associated with the currentframe. It should be further understood that a user selection of an entrypoint option may be used by the playback position module 230 to controlfuture entry point decisions made with respect to the piece of contentcurrently being viewed and/or content that is subsequently output by themultimedia device 110.

FIG. 3 shows a stream of frames associated with a piece of multimediacontent. The stream may include a plurality of I-frames (e.g., I1-6) andone or more other frames between I-frames. While a trickplay function(e.g., fast-forward, rewind, skip, seek, jump, etc.) is being carriedout on the piece of content, and when an instruction is received tobring the content out of the trickplay status or otherwise resume normalplayback of the content, a calculated reposition point 305 may bedetermined. The calculated reposition point 305 may be the frame that isdetermined to be the frame at which the content was at when theinstruction to exit trickplay was received (i.e., the playback positionaccording to the point at which the content is brought out of thetrickplay function). It will be appreciated by those skilled in therelevant art that various methods and techniques may be used todetermine the calculated reposition point 305 based upon the trickplayposition and the time of exit from the trickplay.

In embodiments, the calculated reposition point 305 may be a frame otherthan an I-frame (as is the case in FIG. 3). A new entry point may beselected, for example, by the playback position module 230 of FIG. 2.The new entry point may be selected by repositioning a pointer at aframe other than the calculated reposition point 305. For example, theplayback position module 230 may identify the first I-frame precedingthe calculated reposition point 305 as the new entry point, and thepointer may be repositioned to the frame-based reposition point 310.

FIG. 4 shows a stream of frames associated with a piece of multimediacontent, wherein each frame is associated with a scene. The stream mayinclude a plurality of I-frames (e.g., I1-6) and one or more otherframes between I-frames. In embodiments, each frame within the stream offrames may be associated with a scene. For example, according to FIG. 3,I1 and the frames between I1 and I2 are associated with scene P, I2 andthe frames between I2 and I5 are associated with scene Q, and I5, I6,and the frames following I5 and I6 are associated with scene R. It willbe appreciated by those skilled in the relevant art that varioustechniques may be used to identify and track scene changes within apiece of multimedia content.

While a trickplay function (e.g., fast-forward, rewind, skip, seek,jump, etc.) is being carried out on the piece of content, and when aninstruction is received to bring the content out of the trickplay statusor otherwise resume normal playback of the content, a calculatedreposition point 305 may be determined. The calculated reposition point305 may be the frame that is determined to be the frame being displayedat the point in time when the instruction to exit trickplay wasreceived.

In embodiments, the calculated reposition point 305 may be a frame otherthan an I-frame (as is the case in FIG. 4). A new entry point may beselected, for example, by the playback position module 230 of FIG. 2.The new entry point may be selected by repositioning a pointer at aframe other than the calculated reposition point 305. For example, theplayback position module 230 may identify the first I-frame precedingthe calculated reposition point 305 as the new entry point, and thepointer may be repositioned to the frame-based reposition point 310.

FIG. 5 shows a stream of frames associated with a piece of multimediacontent, wherein each frame is associated with a scene, and wherein anentry point is determined based upon the identification of a sceneboundary. The stream may include a plurality of I-frames (e.g., I1-6)and one or more other frames between I-frames. In embodiments, eachframe within the stream of frames may be associated with a scene. Forexample, according to FIG. 5, I1 and the frames between I1 and I2 areassociated with scene P, I2 and the frames between I2 and I5 areassociated with scene Q, and I5, I6, and the frames following I5 and I6are associated with scene R. It will be appreciated by those skilled inthe relevant art that various techniques may be used to identify andtrack scene changes within a piece of multimedia content.

While a trickplay function (e.g., fast-forward, rewind, skip, seek,jump, etc.) is being carried out on the piece of content, and when aninstruction is received to bring the content out of the trickplay statusor otherwise resume normal playback of the content, a calculatedreposition point 305 may be determined. The calculated reposition point305 may be the frame that is determined to be the frame being displayedat or output to a display when the instruction to exit trickplay wasreceived.

In embodiments, the calculated reposition point 305 may be a frame otherthan an I-frame (as is the case in FIG. 5). A new entry point may beselected, for example, by the playback position module 230 of FIG. 2.The new entry point may be selected by repositioning a pointer at aframe other than the calculated reposition point 305. For example, theplayback position module 230 may identify the first I-frame precedingthe calculated reposition point 305 as the new entry point, and thepointer may be repositioned to the frame-based reposition point 310. Asanother example, the playback position module 230 may identify the firstframe of the scene associated with the calculated reposition point 305as the new entry point, and the pointer may be repositioned to thescene-based reposition point 505. According to FIG. 5, the frame at thecalculated reposition point 305 is within scene Q, thus the scene-basedreposition point 505 is at the first frame of scene Q (e.g., I2).

FIG. 6 is a flowchart illustrating an example process 600 operable tofacilitate the determination of a playback position based upon a sceneboundary. The process 600 may start at 605 where time-shifted multimediacontent is output from a device (e.g., multimedia device 110 of FIG. 1).A trickplay function (e.g., fast-forward, rewind, skip, seek, jump,etc.) may be carried out on the multimedia content as the content isoutput from the device.

At 610, a user command is received instructing the device to bring theoutput of the multimedia content out of the trickplay mode. For example,the user command may be to resume, stop, or pause playback of thecontent.

At 615, a determination is made whether to calculate an entry pointbased on the scene or the first preceding I-frame associated with thecurrent frame at which the content was removed from the trickplaystatus. For example, a user may be prompted to determine whether toresume playback of the content from the beginning of a scene associatedwith the point at which the content was removed from the trickplay modeor from the first I-frame preceding the point at which the content wasremoved from the trickplay mode. The user may be prompted through a userinterface displayed at a screen through which the corresponding contentis being displayed to the user, and the user input may be received atthe device through a control interface (e.g., RCU interface, controlinterface 220 of FIG. 2, etc.). An entry point from which to beginplayback of the content may then be determined based upon the userinput. It should be understood that the multimedia device 110 (e.g., theplayback position module 230 of FIG. 2) may be configured with a defaultoption for selecting between two or more entry points. For example, theplayback position module 230 may be configured to automatically beginplayback of content coming out of trickplay at the first frame of thescene associated with the current frame. It should be further understoodthat a user selection of an entry point option may be used by theplayback position module 230 to control future entry point decisionsmade with respect to the piece of content currently being viewed and/orcontent that is subsequently output by the multimedia device 110.

If, at 615, the determination is made to calculate the entry point basedupon the scene associated with the current frame at which content wasremoved from the trickplay status, the process 600 can proceed to 620.At 620, the scene associated with the current frame may be identified.The scene associated with the current frame may be identified, forexample, by the playback position module 230 of FIG. 2. For example, anassociation between frames of the multimedia content and scenes of thecontent may be retrieved from the content stream (e.g., by scene changedetection module 240 of FIG. 2).

At 625, the first frame of the scene associated with the current framemay be identified. The frame may be identified, for example, by theplayback position module 230 of FIG. 2. For example, the playbackposition module 230 may use scene change data associated with themultimedia content to identify the first frame of the scene associatedwith the current frame.

At 630, playback of the multimedia content may be started from theidentified frame. For example, the playback position module 230 of FIG.2 may create an entry point by repositioning a pointer at the identifiedframe (e.g., first frame of the scene associated with the current frame,first I-frame preceding current frame, etc.). Playback of the contentmay then be started from the entry point.

Returning to 615, if the determination is made to calculate the entrypoint based upon the first preceding I-frame associated with the currentframe at which the content was removed from the trickplay status, theprocess 600 can proceed to 635. At 635, the I-frame preceding thecurrent frame may be identified. The I-frame preceding the current framemay be identified, for example, by the playback position module 230 ofFIG. 2. After the I-frame is identified, playback of the content may bestarted from the identified I-frame at 630.

FIG. 7 is a block diagram of a hardware configuration 700 operable tofacilitate the determination of a playback position based upon a sceneboundary. The hardware configuration 700 can include a processor 710, amemory 720, a storage device 730, and an input/output device 740. Eachof the components 710, 720, 730, and 740 can, for example, beinterconnected using a system bus 750. The processor 710 can be capableof processing instructions for execution within the hardwareconfiguration 700. In one implementation, the processor 710 can be asingle-threaded processor. In another implementation, the processor 710can be a multi-threaded processor. The processor 710 can be capable ofprocessing instructions stored in the memory 720 or on the storagedevice 730.

The memory 720 can store information within the hardware configuration700. In one implementation, the memory 720 can be a computer-readablemedium. In one implementation, the memory 720 can be a volatile memoryunit. In another implementation, the memory 720 can be a non-volatilememory unit.

In some implementations, the storage device 730 can be capable ofproviding mass storage for the hardware configuration 700. In oneimplementation, the storage device 730 can be a computer-readablemedium. In various different implementations, the storage device 730can, for example, include a hard disk device, an optical disk device,flash memory or some other large capacity storage device. In otherimplementations, the storage device 730 can be a device external to thehardware configuration 700.

The input/output device 740 provides input/output operations for thehardware configuration 700. In one implementation, the input/outputdevice 740 can include one or more of a network interface device (e.g.,an Ethernet card), a serial communication device (e.g., an RS-232 port),one or more universal serial bus (USB) interfaces (e.g., a USB 2.0port), one or more wireless interface devices (e.g., an 802.11 card),and/or one or more interfaces for outputting communications to a clientdevice (e.g., client device 120 of FIG. 1). In another implementation,the input/output device can include driver devices configured to sendcommunications to, and receive communications from one or more networks(e.g., local network 130 of FIG. 1, provider network 150 of FIG. 1, WAN140 of FIG. 1, etc.).

It should be understood that the approach described herein does notintroduce any additional search or positioning delay regardless of thecontent or playback speed. The approach may be implemented as a plug-in,thereby allowing devices deployed in the field to be easily upgraded.

Those skilled in the art will appreciate that the invention improvesupon methods and systems for determining a playback position after atrickplay operation is carried out on a piece of multimedia. Themethods, systems and computer readable media described herein facilitatethe repositioning of content based upon scene boundaries. Inembodiments, content may be automatically repositioned at a sceneboundary, so that the content presentation starts from a more meaningfuland sensible point after a re-position (e.g., time-shift, trickplay,seek, etc.). Also provided herein is an approach to provide an optionfor the user to start playback of content from an absolute time basedrepositioned point or a scene based repositioned point. Scene changedetection may be used to detect scene changes within a piece ofmultimedia content as the content is being received, played, or recordedby a device. Scene changes within a piece of content may be identifiedusing scene meta-data created on a per content basis, wherein themeta-data includes the starting frame offset of each scene along withthe duration of the scene.

The subject matter of this disclosure, and components thereof, can berealized by instructions that upon execution cause one or moreprocessing devices to carry out the processes and functions describedabove. Such instructions can, for example, comprise interpretedinstructions, such as script instructions, e.g., JavaScript orECMAScript instructions, or executable code, or other instructionsstored in a computer readable medium.

Implementations of the subject matter and the functional operationsdescribed in this specification can be provided in digital electroniccircuitry, or in computer software, firmware, or hardware, including thestructures disclosed in this specification and their structuralequivalents, or in combinations of one or more of them. Embodiments ofthe subject matter described in this specification can be implemented asone or more computer program products, i.e., one or more modules ofcomputer program instructions encoded on a tangible program carrier forexecution by, or to control the operation of, data processing apparatus.

A computer program (also known as a program, software, softwareapplication, script, or code) can be written in any form of programminglanguage, including compiled or interpreted languages, or declarative orprocedural languages, and it can be deployed in any form, including as astand-alone program or as a module, component, subroutine, or other unitsuitable for use in a computing environment. A computer program does notnecessarily correspond to a file in a file system. A program can bestored in a portion of a file that holds other programs or data (e.g.,one or more scripts stored in a markup language document), in a singlefile dedicated to the program in question, or in multiple coordinatedfiles (e.g., files that store one or more modules, sub programs, orportions of code). A computer program can be deployed to be executed onone computer or on multiple computers that are located at one site ordistributed across multiple sites and interconnected by a communicationnetwork.

The processes and logic flows described in this specification areperformed by one or more programmable processors executing one or morecomputer programs to perform functions by operating on input data andgenerating output thereby tying the process to a particular machine(e.g., a machine programmed to perform the processes described herein).The processes and logic flows can also be performed by, and apparatuscan also be implemented as, special purpose logic circuitry, e.g., anFPGA (field programmable gate array) or an ASIC (application specificintegrated circuit).

Computer readable media suitable for storing computer programinstructions and data include all forms of non-volatile memory, mediaand memory devices, including by way of example semiconductor memorydevices (e.g., EPROM, EEPROM, and flash memory devices); magnetic disks(e.g., internal hard disks or removable disks); magneto optical disks;and CD ROM and DVD ROM disks. The processor and the memory can besupplemented by, or incorporated in, special purpose logic circuitry.

While this specification contains many specific implementation details,these should not be construed as limitations on the scope of anyinvention or of what may be claimed, but rather as descriptions offeatures that may be specific to particular embodiments of particularinventions. Certain features that are described in this specification inthe context of separate embodiments can also be implemented incombination in a single embodiment. Conversely, various features thatare described in the context of a single embodiment can also beimplemented in multiple embodiments separately or in any suitablesubcombination. Moreover, although features may be described above asacting in certain combinations and even initially claimed as such, oneor more features from a claimed combination can in some cases be excisedfrom the combination, and the claimed combination may be directed to asubcombination or variation of a sub combination.

Similarly, while operations are depicted in the drawings in a particularorder, this should not be understood as requiring that such operationsbe performed in the particular order shown or in sequential order, orthat all illustrated operations be performed, to achieve desirableresults. In certain circumstances, multitasking and parallel processingmay be advantageous. Moreover, the separation of various systemcomponents in the embodiments described above should not be understoodas requiring such separation in all embodiments, and it should beunderstood that the described program components and systems cangenerally be integrated together in a single software product orpackaged into multiple software products.

Particular embodiments of the subject matter described in thisspecification have been described. Other embodiments are within thescope of the following claims. For example, the actions recited in theclaims can be performed in a different order and still achieve desirableresults, unless expressly noted otherwise. As one example, the processesdepicted in the accompanying figures do not necessarily require theparticular order shown, or sequential order, to achieve desirableresults. In some implementations, multitasking and parallel processingmay be advantageous.

We claim:
 1. A method comprising: applying a trickplay operation to apiece of multimedia content; in response to a received resume command,identifying a current frame based upon a current playback positionwithin the piece of multimedia content at the point at which the resumecommand is received; identifying a scene associated with the currentframe; identifying a first frame of the scene; and initiating playbackof the piece of multimedia content from the first frame of the scene. 2.The method of claim 1, further comprising: outputting a promptrequesting a user to select between a playback of the piece ofmultimedia content from the first frame of the scene or from an inlineframe immediately preceding the current frame.
 3. The method of claim 2,wherein the prompt comprises a display of the first frame of the sceneand a display of the inline frame immediately preceding the currentframe.
 4. The method of claim 2, further comprising: receiving a usercommand to begin playback from the inline frame immediately precedingthe current frame; creating an entry point at the inline frame byrepositioning a pointer to the inline frame; and initiating playback ofthe piece of multimedia content from the inline frame.
 5. The method ofclaim 1, wherein the first frame of the scene is identified frommeta-data retrieved from the piece of multimedia content.
 6. The methodof claim 1, wherein one or more scene boundaries within the piece ofmultimedia content are identified and tagged as the piece of multimediacontent is received, and wherein the first frame of the scene isidentified based on the one or more tagged scene boundaries.
 7. Themethod of claim 1, further comprising: creating an entry point at thefirst frame of the scene by repositioning a pointer to the first frameof the scene.
 8. An apparatus comprising: a playback module configuredto apply a trickplay operation to a piece of multimedia content; acontrol interface configured to be used to receive a resume command; aplayback position module configured to identify a current frame basedupon a current playback position within the piece of multimedia contentat the point at which the resume command is received; a scene boundarymodule configured to: identify a scene associated with the currentframe; and identify a first frame of the scene; and the playback modulebeing further configured to initiate playback of the piece of multimediacontent from the first frame of the scene.
 9. The apparatus of claim 8,further comprising: a display interface configured to be used to outputa prompt requesting a user to select between a playback of the piece ofmultimedia content from the first frame of the scene or from an inlineframe immediately preceding the current frame.
 10. The apparatus ofclaim 9, wherein the prompt comprises a display of the first frame ofthe scene and a display of the inline frame immediately preceding thecurrent frame.
 11. The apparatus of claim 9, wherein: the controlinterface is further configured to be used to receive a user command tobegin playback from the inline frame immediately preceding the currentframe; the playback position module is further configured to create anentry point at the inline frame by repositioning a pointer to the inlineframe; and the playback module is further configured to initiateplayback of the piece of multimedia content from the inline frame. 12.The apparatus of claim 8, wherein the first frame of the scene isidentified from meta-data retrieved from the piece of multimediacontent.
 13. The apparatus of claim 8, wherein one or more sceneboundaries within the piece of multimedia content are identified andtagged as the piece of multimedia content is received, and wherein thefirst frame of the scene is identified based on the one or more taggedscene boundaries.
 14. One or more non-transitory computer readable mediahaving instructions operable to cause one or more processors to performthe operations comprising: applying a trickplay operation to a piece ofmultimedia content; in response to a received resume command,identifying a current frame based upon a current playback positionwithin the piece of multimedia content at the point at which the resumecommand is received; identifying a scene associated with the currentframe; identifying a first frame of the scene; and initiating playbackof the piece of multimedia content from the first frame of the scene.15. The one or more non-transitory computer-readable media of claim 14,wherein the instructions are further operable to cause one or moreprocessors to perform the operations comprising: outputting a promptrequesting a user to select between a playback of the piece ofmultimedia content from the first frame of the scene or from an inlineframe immediately preceding the current frame.
 16. The one or morenon-transitory computer-readable media of claim 15, wherein the promptcomprises a display of the first frame of the scene and a display of theinline frame immediately preceding the current frame.
 17. The one ormore non-transitory computer-readable media of claim 15, wherein theinstructions are further operable to cause one or more processors toperform the operations comprising: receiving a user command to beginplayback from the inline frame immediately preceding the current frame;creating an entry point at the inline frame by repositioning a pointerto the inline frame; and initiating playback of the piece of multimediacontent from the inline frame.
 18. The one or more non-transitorycomputer-readable media of claim 14, wherein the first frame of thescene is identified from meta-data retrieved from the piece ofmultimedia content.
 19. The one or more non-transitory computer-readablemedia of claim 14, wherein one or more scene boundaries within the pieceof multimedia content are identified and tagged as the piece ofmultimedia content is received, and wherein the first frame of the sceneis identified based on the one or more tagged scene boundaries.
 20. Theone or more non-transitory computer-readable media of claim 14, whereinthe instructions are further operable to cause one or more processors toperform the operations comprising: creating an entry point at the firstframe of the scene by repositioning a pointer to the first frame of thescene.